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Object
............................................ Hercules Great
Globular Cluster (M13)
Constellation .............................. Hercules
RA / DEC ..................................... 16h:41m.41sec
/ +36°
27m.35sec
Distance + Ap. Magnitude......... 25.100 Light years / 5.8
Date + Time ............................... 04/07/2018 - 19:10 UTC
Location .................................... "Nunki
Observatory" - Skiathos
Optics ......................................... Officina
Stellare Advanced RILA 400 f/5.25
Mount .......................................
Paramount ME
Camera ..................................... SBIG
STXL11002 with FW8G-STXL (Astrodon
filters)
Exposure Time....................... l: 30X 60 sec , RGB : 30X
60sec
Guiding .................................... Unguided
Processing Details .................. ACP , Maxim , Photoshop CC
More Details ........................... Environment Temperature
: 25 oC Camera Temperature -30 οC
Sky temperature ..................... 7.0. οC
Notes ........................................ Weather: Clear
Transparence: Medium
Humidity : 75 %
Moon Illumination ............... 82%
Target details ......................... Messier
13 (M13),
also designated NGC 6205 and sometimes called the Great
Globular Cluster in Hercules or the Hercules Globular Cluster,
is a globular
cluster of about 300,000 stars in theconstellation of Hercules.
M13 was discovered by Edmond
Halley in 1714, and catalogued by Charles
Messier on June 1, 1764.
It is barely visible with the naked
eye on a very clear night. Its diameter is about 23 arc minutes
and it is readily viewable in small telescopes.
M13 is about 145 light-years in diameter,
and it is composed of several hundred thousand stars,
the brightest of which is the variable
star V11 with an apparent magnitude of 11.95. M13 is 25,100
light-years away from Earth
The Arecibo
message of 1974, containing encoded information about human race,
DNA, atomic numbers, Earth position, was beamed there for being
picked up by a potential extraterrestrial
civilization. It will reach the cluster in 25,100 years.
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